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D. C. MULVIHILL. MoLnFoRMINAPPAH/uus.

APPLICATION FILED JUNE 23, I9I9.

Patented Dee. 23,1919.

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wjfw/i/u` w I nl l I Nm.I XN kN u I D. C. MULVIHILL. MOLD FORMING APPARATUS. APPLICATION FILED-mums, Isls.

Patented Dec. 23, 1919.

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D. C. MULVIHILL. 'MOLD FORMING APPARATUS.' APPLICATION FILED JUNE Z3, 1919.

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Patented Dec. 23,41%9.

D. C. MULVIHILL. MOLD FORNIING APPARATUS APPLICATION man 'UNE 23,1919.

Patented Dec. 23, 1919.

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MoLnroni/riive .arranarus Specification of Letters Patent.

Patented Dec. 23, 1919.

.application filed .Tune 23, 1919. Serial No. 306,059.

Forniing Apparatus, of which the following is a specification, and which are illustrated in the accompanying drawings,jforming a part thereof.

llhe object of the invention is the pro' vision of means whereby molds may be formed and separated from the pattern more readily and efficiently and with less damage to the mold than heretofore. 1n the accompanying drawings; Figure 1 is a side view, Fig. 2 is an end view of an old form of I for.

j olting machine supporting ainold forming apparatus embodying the invention,

Fig. 3 is a plan view of the stripping plate with the stripping ring in place but with the pattern removed,

Fig. 4 is a central vertical section showing the drag in place on the ring, j

Fi 5 is a similar section showing the molding of the cope and with the mold separated from the pattern;

Fig. 6 is a bottom plan view of a weighted rammer utilized in conjunction with the cope,

Fig. 7 is a perspective view of a gate forming implement,

Fig. 8 is a plan` view, and

Fig. 9 is a section taken on the line 9-9 of Fig. 8, of a Hasklocked upbut with a portion of the sand removed to show dej.

tails.

\ The invention is preferably utilized in,`

machine may be employed, as that illus-j` trated in Fig. 1, in which 10 indicates the table having an annular ring 11 depending therefrom guided in its reciprocatory movements by pedestal 12. A shaft 13 is caused to rotate by a motor 14 when connected thereto by clutch 15, causing eccentric cams 16 carried by shaft 13 to act upon thejolting table.

A stripping plate, as 17, has projecting from one side near the margin a flange, as

18, forming a closed figurefits form being annular in the embodiment of the invention chosen for purposes of illustration.

Fedestals, as 19, eight being shown on the drawing, project from the stripping plate outside of the flange 18. An annular stripping ring 2O is provided with pedestals 21 adapted to register withand be supported by pedestals 19. Ring 2O has perforated lugs, as 22, shown as two in number projecting in opposite directions from its margin.

i Patterns are illustrated in Figs. l and 5, as at 23 and 24, each provided with an annular flange, as 25 and 26, adapted to rest upon fla-nge 18, and each with a projection, as 27 and 28, adapted to rest upon ring 20. The patterns illustrated are for the produetion of a lcar wheel, but obviously other shapes or forms might be submitted there The pattern shown in place in the drag in Fig. t is formed to the shape of the inside of acar wheel and that of Fig. 5 to the outside ofthe saine wheel.

A. plurality of shafts, as 29, 30,1 shown as two in number, are j ournaled in bearings, as 31, and project through flange 18 and in the inclosed space cranks, as 32, 33, are rigidly secured to the shafts and connected by a link 34. A. lever 35 may be applied to one of the shafts, as 29, an end of the shaft being shown; as projected beyond the base for the purpose. Each of the shafts has arcani, as 36, secured thereto near itsn end. A reciprocable pin, as 37, preferably provided with an antifriction .roller such as 38, mountedin its end, is provided `for each cam, and each pin stands within an opening in ring 20 and upon actuation of cam 36 will be caused to project above the surface of this ring. j j

The drag has diametrically oppositely projecting lugs, as 39, perforated as shown, andthe part of the flask for the cope is provided with a chill, as 40, and lugs, `as 111, perforated as shown, project diainetrically oppositely from the chill. When either the cope or the drag part of the flask with the appropriate pattern in place is to be` filled with sand on the j olting table, steady pins, as 4.2, are passed through the corresponding perforated lugs on the flask part and on ring 20 to maintain the relative position of parts. Also when the mold is completed and the flask is assembled as shown in Fig. 9, steady pins are passed through corresponding lugs y on cope and drag to position the parts.

pattern may be conveniently handled by a crane and similar lugs project from the chill for a like purpose.

Pattern 23 is shown as provided with projections, as 44, 45, and pattern v24 with a projection, as 46, to form core prints in the mold. The parts assembled as inFig. 4, are placed on the jolter and filled with sand. In the case of the drag', ring 20 gives form to the portion of the parting outside of the pattern, lbut the corresponding portion of the parting of the cope is formed by a portion of theehill. After the drag has been filled with sand and compacted, a board,as

.47', Fig. 9, perforated for the escape of gases,

is] placed over the same. Lever is now operated to cause pins 37, under influence of cams 36to be projected above ring 2U against-the edge of thek drag whereby the Amold is gently and directly stripped from thepattern, lby motion parallel with its axis.

Pattern'24. is then substituted in place of pattern 23. The cope comprises an exterior ring, as 48, anl interior ring, as 49,`and radial ribs orwebs, as 50. Ring 49 and ribs 5,0 are of such an extent yas to be spaced away from the face of the pattern when assembled j. therewith in order that the face of the impression may be composed entirely of sand.

YAlso the lower edges of this ring and'each rib are sharpened, as at 51, to prevent cavirtiesin the sand of the finished mold opposite these edges. The provision ofring 49 and ribs 50 lresults in breaking up the sand into small masses that may readily lift without danger of collapse of thevmold.

The cope having been placed on ring 2U with the appropriate pattern in place, the

`'gate forming implement 52 shown in Fig. 7, is placed upon the core print 46` with the gate forming ribs 53 projecting downwardly aboutthe same to the surface ofthe pattern. Sand is then placed in the cope and the jolter set in operation. A rammer, as 54,

described and claimed. in an application filed by myself July 3, 1919, Serial No. 308,555, is placed on the sand in the cope to compact the same. Thisv rammer comprises an annular weighting disk, as 55, having blocks 56'which may be of wood screwed thereto, as by screws 57. These blocks lare spacedl apart to form spaces, as 58, which shall register with ribs 50 of the cope.

Under the ,influence of this weighted rammer andthejolting table the portion of the v sandI between the ribs will be compacted Y without hand ramming of each compartment. Fig. 5 shows the cope and its compacted sand separated fromthe pattern by operation of lever 35. After the cope has been removed from the pattern, the gate forming implement 52 will be removed prior to assembly of the flask. When using the gate formingimplement in the form disclosed, it is not necessary to be careful to An annular core, as 59, provided with sup- 7o porting legs (30, which will register with and be located by core print 45, will be placed in the drag and chaplets (51 placed in openings in lugs 62 provided for the purpose on ring 49 are supplied to press upon core 59 and prevent the same from rising by flotation when the metal is poured in. Also a core G3 to provide for the shaft opening is placed in core print 44, and will nroiect into the space, as 64, left by the removal of implement 52. This will leave gates 65 communicating with the space in the mold to be filled with metal. If now metal be freely poured into space 64 upon the end of core 63 it will find ready access to the mold. Clamps, as 66, are shown to hold the flask in assembled condition.

Obviously many changes and modifications c-an be made in the physical embodiment of my invention without departing from the spirit thereof.

I claim as my invention:

1. In a mold forming apparatus, in combination, a base plate, a flange projecting from one face adjacent the periphery thereof adapted to support a pattern, a. pair of shafts journaled on said plate and projecting through the flange, means to cause simultaneous motion of rotation of each shaft, a cam on each end of each shaft, a. flask part supporting ring supported above said base, pins adapted to reciprocate in openings in said ring, said pins coacting with said cams whereby motion of rotation of said shafts will cause the flask part and its contents to be separated from the pattern.

2. In a mold forming apparatus.I .in combination, a base plate, an annular pattern supporting flange projecting from said plate,

a plurality of pedestals projecting from the plate outside of said flange, a flask part supporting ring provided with pedestals adapted to rest upon the first named pedestals and means to lift the flask part from the ring` whereby the mold will be separated from the pattern.

3. In a mold forming apparatus, in combination, a pattern supporting base plate, a frame supported on said base plate, ad aptcd to underlie a portion of a pattern and to support a flask part and means carried by the base plate to separate the flask part from the pattern and frame.

4. In a mold forming apparatus, in combination, a fbase plate, means on said plate .for supportinga pattern. a frame supported to separate the flask part from the pattern pattern, to support a flask part in molding and frame relation there to and to give form to a por- 5. In a mold forming apparatus, in eomtion of the mold, means carried by the plate 10 I lonaton, a plate adapted to be placed on a to separate the flask part from the frame and 5 jolting; machine, means on the plate to suppattern.

port a pattern, a frame supported on the plate adapted to underlie a portion of the p p DANIEL C. MULVIHILL. 

